{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Chemical"], "input": "At present , gene expression and pathology changes were systematically studied in small intestine , liver , kidney , and brain tissue from male SAGE Mdr1a - , Bcrp - , and Mrp2 - knockout rats versus wild - type Sprague Dawley controls ."}
{"Chemical": []}